Automatic circuit-closer



I. RUKSTALAI AUTOMATIC CIRCUIT CLOSER;

APPLICATION FILED JAN-29,1918.

1,372,314.. Patented Mar. 22, 1921.

INVENTOR.

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BY $6M A TTORNE Y.

PATENT OFFICE.

JOHN RUKSTALA, OF DETROIT, DIICHIGAN.

AUTOMATIC CIRCUIT-CLOSER.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed January 29, 1918. Serial No. 214,276.

T 0 aZZ whom it may concern:

Be it known that 1, JOHN BUKSTALA, a citizen of Russia, resident of Detroit, county of Wayne, and State of Michigan, have invented certain new and useful Improvements in Automatic Circuit- Closers, of which the following is a specification.

This invention relates to improvements in automatic circuit closers and has as its special object the provision of an apparatus which may be placed at any exposed location, and which contains elements that will cause a signal to be given upon a definite rise in the temperature.

A further object of the invention is to provide an apparatus which, after it has been installed, requires no attention and which may be depended upon to produce the desired results,

These and other like objects are attained by the novel construction and combination of parts hereinafter described and shown in the accompanying drawing, forming a material part of this disclosure, and in which 1*- Figure 1 is a plan view showing an embodiment of the invention, the cover being removed so as to disclose the interior.

Fig. 2 is a side elevational view of the up paratus, parts being broken away in order to disclose the construction, and

Fig. 3 is a horizontal sectional view, taken on line 3-3 of Fig. 1.

In the drawing the numeral 10, designates a wall to which the apparatus is attached, 11 indicates a battery, and 12 a conventional type of electric bell engaged by the wire 1d, with one pole of the battery, the other wire 15, entering the casing 18 01": the apparatus, as does also the wire 16 from the battery 11.

The casing of the apparatus, here shown to be substantially cylindrical, is secured to the wall by feet 19, through pass screws or other securing means. A cover 20, is provided for the casing, the same held by screws passing into the internal lugs 21, formed at the sides of the casing. The wires 15 and 16 enter through the opening in the side of the casing and are attached respectively to binding posts 25 and 26, secured upon an insulating block 24 engaged on the bottom wall 23 of the casing.

Also secured to the wall 23, is ahorizontally disposed bracket 28, which, together with the arcuate cap 29, secured by screws 30, contains an opening receptive of the cup 32, having a neck 33, leading to a spherical bulb 35, extending through an opening 36, 111 the lower part of the casing 18, the bulb containing an expansible substance, preferably mercury 37, which will rise in the neck 33, when subjected to a high temperature.

Contained in the cup 32 is an annular rubber washer 39.

Resting on the washer 39 is a plunger 40, having upon its upper side a raised lug L1, in which is pivotally engaged a link &2, guided in an outwardly extended cover plate 43 secured by screws id, to the bracket 28, and engaging by a pin 4L5, with a lever d8, pivoted on a projection extending up from the rear wall 23, by means of the screw d9. The front end of the lever normally rests on a stop 50, set laterally in the bracket 28, the end of the lever 45 being provided with a contact 52 engageable with an arm 53, formed with the block 5%, to which is attached the binding post 26.

Engaged with the lever 48, is a. flexible wire 55, connecting with the binding post 25, and in such manner as to permit the lever to be freely operated.

The device being connected with the battery and the bell 12, its operation is as follows Heat being communicated to the bulb 35, causes the mercury to rise pressing the disk 39 up, thus raising the plunger 40 and, through its connections, the lever d8, so that the contact 52 makes engagement with the arm 53, forming a circuit to the battery and bell, whereupon the latter will ring, calling attention to the fact that a dangerous degree of heat exists in the region of the apparatus.

From the foregoing it will be seen that a simple and effective device has been indicated for the purpose and the same may be depended upon for long continued service without deterioration.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is

In a device as described, in combination, a support, and an insulated member secured thereto, a contact arm secured to said member and projecting therefrom, a bracket projecting outwardly from said support, an arcuate cap secured thereon and having an opening, a spherical bulb containing mercury, having a neck depending from said arcuate cap, and an integral cup fitting snugly into said opening, a rubber washer in said cup, a slidable plunger resting on free end of said lever resting upon said stop said Washer and having a raised lug, a cover and adapted to engage the projecting end 10 plate secured to said bracket and having a of said contact arm upon the rise of the slot, a link attached to said lug and guided mercury under the influence of the rising in the slot of said cover plate, a lever t0rmtemperature, substantially as described. 7

ing a contact pivoted at one end of said In testimony whereof I have affixed my support, said link being secured to said lever signature.

and a stop secured upon said bracket, the JOHN RUKSTALA. 

